Physical state at 20 °C | Solid | Colour | White powder |
Melting point/ Freezing point [°C] | 300 °C |
Appearance | White to Light Yellow powder |
Assay (as carboxylic acid groups (COOH); on anhydrous basis) | 19.0 – 25.0% |
Identification | Passes test |
pH (3% solution in water) | 1.5 – 3.5 |
Arsenic (As) | Max 0.0005% |
Heavy metal (as Pb) | Max 0.004% |
Acid value (mg KOH/gm) | Min 230.0 |
Total ash | Max 4.0% |
Loss on drying (at 105°C; 4 hrs) | Max 15.0% |
Microbial contamination | 1 gm is free from Escherichia.coli and 10 g is free from salmonellae |